wow, long stretch along Lake Bluff & then zion & north are 3G only... but, 3G should be solid for you 100 miles any way but east!
Per:
Sprint - Nationwide Coverage
Haven't looked at the coverage maps in a while, new to me it the 4G "In building" vs. "On the Street". Interesting.
Will do some more tests on mobilespeedtest.com & dsl mobile again soon... but those are the ones I tested with.
Did you try field test yet & see what your -dbm is around your place? Don't know if it works with wp7 or not, but must be another that does???
*edit*
Opera 9 speedtest.com around 500kbs @ -58dbm (very good reception) 1 mb files
UC Web speedtest.com from 2000kbps on 1 to 3 mb files, & a couple times around 3500kbps.. 3.5mbps
Don't think UC Web browser uses a server & just sends screen pops like skyfire or UzardWeb browser, not sure what's the diff, but many report it to be the fastest surfing for them... probably doesn't work on a wp7 dev.
Didn't run any Uzard tests as the results are skewed due to above reasons.