Congrats on coming over to the Dark side.........Muha hah ha ha ha.... Bye Bye AMD, Hello Intel.
But seriously, if your budgeting only around $90 for a MB, then your probably going to end up with an okay board with just blah features. Now if you just pony up an extra $20 or so you'll get yourself something to be proud of and that will last you a long time. This board would be a ABIT IS7, which goes for $108. Of course you should also look at the ASUS P4P800 which goes for $121. I mention these two boards, as they have even better performance then their supposed higher performing Canterwood board. Now of course with budgets, $20 may not seem like such a big deal but when folks are on one when they are building a PC it can mean a difference between a good board and a great board. It would be definitely worth it to spend the extra $20 or so and get the extra features. For 875 boards, check out the ABIT IC7 which goes for $120. It's the most stable board I have ever used, and a kick ass overclocker.
You may also want to read the reviews more closely as ABIT has a active cooling solution for their Northbridge chipsets, and this will definitely help if your going to be OC'ing. But before you plunk down any of your $$ read more than one or two reviews about the board you've made your mind up about.
One thing I can't stress enough, is that you better act quick, before Intel revises the Springdale chipset and eliminates the Canterwood PAT mimicking.
I have a ABIT IC7 I got back in early June, right before all of the stellar Springdale reviews came out. If I had to do it all over again, I would probably get a IS7-G or a P4P800-Deluxe. Nevertheless, I'm not unhappy with my board, its rock solid.
Good luck man, and keep us updated on what you get.