*raises hand* Another happy Janome owner here! I have a 6600 as my main quilting machine (love that accufeed) and I just recently bought a 3160QDC as my "travel" machine and so I could have a free-arm for basic clothing repairs/hemming - that thing sews so nice and smooth! Both are excellent machines, I'm really happy with both of them.
I'd say visit dealers in your area and test-drive machines of all different brands. If you're going to spend a lot of money on a machine it pays to check out the dealers themselves too - some (I'll even say "most") are marvelous but like anything else in life there are some that are like sleazy used car dealers. If you have trouble with your expensive new machine you want to work with someone you trust to get it fixed correctly and without ripping you off.