- Joined
- Feb 29, 2012
- Messages
- 785
If it was me, I'd keep the GB2 and the PM2 both and sell the Seb 21. 
Since that wasn't quite what was asked... I'd keep the GB2. The PM2 is great and a K390 version even more so, but it would also be easier to replace if you find yourself regretting your decision. Maybe not in K390, but S110V, 20CV, or Maxamet or CruWear once they start making regular production ones, etc.
GB2 might end up being harder to replace if you regret it. (Lot of people seem to feel that way about the now-discontinued GB1, for example.)

Since that wasn't quite what was asked... I'd keep the GB2. The PM2 is great and a K390 version even more so, but it would also be easier to replace if you find yourself regretting your decision. Maybe not in K390, but S110V, 20CV, or Maxamet or CruWear once they start making regular production ones, etc.
GB2 might end up being harder to replace if you regret it. (Lot of people seem to feel that way about the now-discontinued GB1, for example.)