I highly recommend the glass window top from Autotopsdirect.com

They offer the same product as GAHH for way less, and I installed it myself in a weekend with the instructions they supplied. In terms of aesthetics, I think the car looks much better than the plastic top. In terms of visibility, you lose a bit but not a ton, and the clarity is off course much better. Access to the engine is a little tougher but manageable.

I live in RI and just had a new plastic window put in for $450

ATD glass window install ran me just over 1200 bucks.