do you need to sell the 5, either financially or space-wise? Do you like riding the 5? See the bikes I regret selling thread. Ive withdrawn my 5" Coiler from sale-after buying a Nomad I had originally decided to get rid of it. They have similar travel and arguably fill the same role/niche, but the Coiler owes me nothing, is a hoot to ride, and I'd be less miffed if it got trashed jumping/playing or due to winter riding than the new-to-me Nomad. The Coiler is being kept in heavy, sturdy play bike build.
The only other option I'd consider would be Jonb's; put the Coiler bits on a HT frame for hassle-free winter riding. Except I gave up HT's due to a bad back, and I dont 'neglect' my bikes enough to benefit from that theory-I'm a bit AR about cleaning and maintenance. In any case I'd probably still mothball the Coiler frame not sell it.