Yeah, so the 55g topre is very popular, but only available in a few select boards. The most popular topre layout is probably the HHKB which comes with 45g domes. Some poeple will buy both boards, and transfer the 55g domes from the realforce into the hhkb, then resell the realforce with the 45g domes from the hhkb.. lots of options available! You can also get the hhkb Type S which has slightly different stems and is very quiet. And the new novatouch has cherry mx stems on a topre board, so that you have more keycap options available. Some enterprising people are switching the novatouch cherry-compatible stems over to the hhkb so that they can fit cherry caps on it!
If you have the money/incentive to do it, you can spend a lot of money just to transplant different parts of different boards into one amazing keyboard!