Hey dude welcome to paintball, now as far as the PMR vs Ion thing goes, i own one of each, and they both rip in their own little way, i would say first off as everyone has said before, the mask, go with something you feel comfortable wearing, as they do vary in terms of size and stuff, i the Dye I3 pros and they are uber light and look cool as well lol
, anyway go with something that is comfortable for you to wear but as ppl have said V Force, Dye or Events all excellant, masks and all comfortable.
Now onto the gats now i have both an ion and a PMR i admit with the ion i have added a few ups onto it like a new asa and also q lock, the two main upgrades everyone gets, and then more stuff, the point is the ion is awesome in terms of its simplicity to strip down and clean and put back together. Its quick and easy and also really fast to do. Now the PMR i think it is an excellant marker, its strips down easily and also rips, Dye products in general are awesome, the end of the day i think it is up to you in terms of budget but i would say at the moment the PMR in terms of cost is the better deal, more for your money also a newer marker, if you do decide to go down the PM5/6 or DM 5/6 route dont get anything older than an 05 or 06 as parts can be harder to find, i mean there are some amazing deals on here atm on PM7s, as far as clothing goes start with the playing trousers then top and then all the other stuff, in terms of colours get any one you want, but bear in mind some colours such as orange are banned in certain tournaments.
In conclusion and yes i know i have gone on a bit, have some fun and have a blast the snetterton site is awesome, and any walk on days you go to ppl will help you out with advice and stuff, generally in paintball we all wanna help ppl just starting as we have all been there ourselves at some point.