im using an SLG for sup air and woodsball and it is a great starter marker but i would recomend 30 quid more for a PMR and they are better than the ion in my opinionhaving £90 to spned on your marker allows you quite a few choices.
PMR
SGL
ION
Promaster
the list goes on and on.
best bet is - try before you buy
everyone has different tastes.