please help, i am looking for an amp. i want good jazz tones but also want good crunchy distortion.i heard marshalls are are good jazz amps and also have good distortion, which one though?please help, this may sound dumb but help a new guy out

I am extremely happy with my Carvin MTS-3212 combo. Before that I used to play a Marshall JCM-800.
The clean channel on the Carvin is amazing. I am going to change the tubes, though, and replace them with Svetlanas 6L6GC. It is very clean, with lots of headroom and an incredible low end.
I don't know if this is a good jazz amp, since I play mostly blues and rock. For advice on this (and many other things) you might want to check out Carmine D'Amico. I think he's out for a couple of days, but should be back next week. I think he uses Mesa Boogie.

Sorry, I always forget to include the link
http://studioguitarist.tripod.com/STUDIOGUITARIST2/

Check out the new DSL and TSL amps marshall is making. They have great clean in addition to that great Marshall crunch. I love my TSL122.

You want an old Fender if you want a good, warm clean-tone. You can always add an overdrive pedal for some crunch. Start with a good clean tone and build from that. Avoid all the Crate, Carvin, Line-6 kiddie-crap and buy an old Fender Pro and something like a Blue Tube overdrive. If you want jazz tone plus the ability to crunch, this will work.

Stick with either an all tube older Fender, or a Marshall. You can't go wrong, and you'll have an amp that will last you a long time. Want versatility...try a Marshall 30th Anniversary 6101 combo. It will give you more then you could get out of most other amps and at 4 different wattage levels, from 25 watts up to 100 watts. It has 3 channels and sounds great, just ask Sach, he uses them. Also Marshall TSL amps. For Fender, they are not quite as versatile by themselves, but a Vibrolux Reverb (older model) or a Fender Pro Reverb or Super Reverb will also do wonders in most playing situations where out and out power are not called for.