In addition to WPI, I’d second another’s recommendation of Lehigh. I’m not sure if you visited or not, but I’ve seen Lafayette, Bucknell and Union bantered about. Although their reputations are reasonable, it’s quite obvious that they are lacking in the facilities department once you’ve seen all the cool toys at schools with better ones.
I also think Tufts might be a fit, but their biggest problem is no merit aid. It’s really hard to justify the price unless you’re eligible for needs based financial assistance.
I know it’s probably been mentioned before, but what is your home state?