that is too bad as you will not find a more simple and easy to maintain atv out there. a 2-stroke is much simpler to maintain than a 4-stroke and they both need maintenance (much more on a 4-stroke). if you step up to one of the machines you listed then you also will have more parts that will need fixed. and they will need the same basic maintenance such as chain adjustment, jetting, lube and oil change, clutch adjustment, etc.... plus you will have to make sure that your cooling system is working good and you may want to take extra coolant on long rides and/or hard rides. i would not get another blaster as you know what you have fixed on yours and you will not know what is wrong with the other one (unless you keep yours for parts). however, if you do get another quad i would suggest a trx400ex (and I am NOT a honda fan)....a newer one with reverse. the trx is as simple to maintain as a 4-stroke can be made as it is air-cooled and old tech but yet can make some decent power. they are as almost as simple to keep running as a blaster and they have a great handling full-size chassis. i have 3 blasters 2 w/ @ 100 hours and one that was raced for a few years and they have been very good to me. my friends daughter has an 03 w/ over 400 hours on it w/o ever having the top-end off. it was changed over to premix 32:1 klotz on non ethanol gas jetted rich and it has lived in the Oregon dunes for 375 of those hours. last year I gave her an fmf exhaust, timing advance plate, and k&n filter. we are seriously impressed and are waiting to see how long this blaster goes before we hear any odd sound coming from the engine (surprisingly it still has good compression). my blasters lug my 290 butt around nicely but I have to run them hard to do anything and they are still holding up fine. please do not get discouraged as we can help you to sort any issues that you may have and always remember that when you buy another quad (if it is used) you never know what you are getting- it might be golden but it could also be a lemon. sorry about the length of this response.