The Giant is a amazing bike as long as you are moving fast, going slow specially climping is like riding on melasas, beleive me you keep looking down at the tyres to see if they are flat or something..
I'm pretty strong and i also try my best to set the bike for "Multi-use" porposse, did not make any diference.
then i got this, Nicolai M-pire for as heavy as she is,it climps really well, but sadlly will cost you "A little More" than $3000 dollars.
I will recomend you to look for a Iron Horse Sunday that features a DW link in the rear end.
is not setup for a front derreiluer but you can run a E-13 guide with a daul ring and a E-type derreileur.
my choice for that kind very capable Downhill but multiuse playbike.
is this Canadian Balfa two Step DH, exelent frame design super strong and agil, the only problem is that they don't make them anymore, (You can still buy a new one in England, but they cost far to much)
maybe you get a idea of how you can set her up (this is not my build) but you can run a fron t derreileur if you want or a single ring in front.
the pertinent size data
Balfa also made a incredible Downhill frame call the BB7
list this ones
and currentlly two companies are making updated version of the concept
and the mension above "Appalache" frames...
also your typical santa cruz with the VPP sistem, like the VP-free and the new V-10 pedal up pretty well if you consider how much mass they carry.
I hope this Helps,,i will vote for the Iron horse Sunday, they are not that expensive, but perform and ride like bikes costing far more..