x18 VS X19 for first bike Where to buy?

I was wondering which is a better first bike x18 or x19 or are these good first bikes at all? If there not, please give me suggestion. The things im looking for in a bike are pretty general, since ive never owned one before:
1.) Speed
I can handle a lot of speed
2.) Torque
Needed for wheelies and burnouts
3.) Reliability (though i am pretty good with engines)
Well duh, don't want to break
4.) Good sound
I want a loud muffler
5.) Performance parts
I will want to make it faster and louder
The x18 seems to have a ton of performance parts, but i like the styling of the x19 better, I dont care about dual or single exhaust though, I just want it to be loud.
Please help me because i want to get it for christmas
How should i convince my parents
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Some stuff i forgot:
My dad says i should be able to sit on the bike before i get it but i read about a lot of people ordering them online. The place I'm looking at so far to buy them from is http://www.thepocketbikeoutlet.com/

there also illeagle to ride on the roads in missouri so i havent found any stores that sell them yet

im doing the same thing, researching. personaly, go with the x-18. i do like the style of the x-19, but the x-18 has been arounf for a while. more parts availible. plus the x-18 is a little cheaper, so trust me! x-18 for the performance parts! also pocketbikesunimited has an x-18 for 570 bucks, best deal, i hae searched all over! and if you want to do wheelies, you need a manual transmision!

the x18 is not loud stock ill give u a link for a vid of a 5 second mod i did to my exhuast to make it sound a whole lot better

http://www.youtube.com/watch?v=2h0zf11Z7KE

thats the vid of my x18 shifting into 4th gear.

I have both bikes. My 18 is very fast for my weight (230) stock about 40. Both 19's are stock, but they fit me better(5'7"1/2). Watch who you buy them from, www.thepocketbikeoutlet.com they take for ever to get back with you plus if you call they are closed and the have people there that will tell you anything to buy from them. When you do get the bike and have a problem with it, they want you take pic's(didn't have a problem with that) over and over saying they can't tell from your pic's. Got the bikes on 11-07-06 and still waiting for the warranty parts to show up, one person said the parts where mailed but no tracking # yet, they didn't even send a e-mail like they said they would do. Called back when someone answers the phone and they said the parts never went out yet because they had a part that was back ordered(WOW)!! So shop well and check the warranty service before you buy anything online!!

go with pocketbikesunlimited . com they have a good reputation, and good prices! also, rabbitscotters . com is pretty good, so i worldebuy. com check them out!

bought it off of ebay.. the cheapest price and asked if he got it from astech or whatever it was for the bike.. cus thats the main place.. all he does is send em the money..

i got the x19... never rode the x18.. but the x19 is great.. and comes with a 17 front tooth sprocket.. comparing with the other posts about x18.. i can say mine and 2 others go faster than x18 stock.. mine hits 53 while the other 2 hits 57 and 59.. those are 2 other friends.. and are stock..

there are tons of parts for the x19.. cus its the same as the x15 and x18..

get it from worldebuy.com you get a free helmet!

anyone kno how to do a burnout? lol.. this bike got no power.. i don't think both bikes even can.. but i kno that can do wheelies.. but by droppin the clutch REALLY HARD! not just pulling up like a real bike

if u see my vid i do a burnout like nothing

what i do is drop it in 1st or second gear press the front break and give it gas to get into rpms and then slowly let go of the clutch then the wheels start spinning. i did one in 3rd gear before i left to newjersy looked liked one from a real motorcycle