Hi,
In your position I would keep the 1d1 and sell the 2B. I've got both and I find the 2B very troublesome. Firstly mine has a timeing fault so you can't use a lot of accelerator cards with it and secondly it has double the number of clockport pins which makes it a bit dodgy to expand in that area as well.
Cheers,
Rudi.
Ps. The A1200 in my sig is the 2B I only use that one because it's the only Amiga I've owned since new :-) The 1d1 stays in reserve.