hey looks like your getting a lot of good advice here hope its all helping
just want to throw my oppinion in and just let you know your right sayin the loader is definately the weak link, you need to remember that the primo is AT MOST 8 balls a second i.e. it could struggle to keep that up, which is the only reason i'd go with a motorised hopper just so you can rely on it
as wizard said its important that you get a good mask to start with, as it'll serve you much better in the long run. stretching to about £35 is plenty and should certainly see you to a good mask. no doubt you can see out of the mask you had in mind, but peripheral vision will probably be very limited (almost tunnel vision
) as well as it being incredibly hard to change lenses, and probably really uncomfortable foam on your face. its a shame but thats how they keep the costs down on masks.