the e2 and zero b boards also have ramping. so does the tadao if your feeling fancy. they have MUCH better battery life than the E1 board too.
i really like the blue hoses/cocking rod knob, i think it would be cool if you could get a chrome lpr and keep just the blue knob.
does yours have the threaded feedneck? some of the later 04's did. if yours does you could get a clamping one.
im not a fan of drops
youd love having a different regulator that you dont have to take apart to adjust too.
wgp internals were always pretty good. no real reason to change them, but the maddman spring kits are cheap ($10) and allow for tuning that would make a bigger difference than a new valve/hammer.