Depends on what style of play you prefer, but nowadays, sites tend to accept both electro and mech markers.
Despite being an Ion owner myself, i personally wouldn't recommend one, purely for the fact that there are better markers out there, and if you get an ion, the liklihood of you upgrading it is high. I personally would recomment either one of the following for a first time marker.
The ion retails at around £240 (from Fat bobs)
For an extra tenna, you can get a Dangerous power G3 from lips for £250
or for slightly less a Proto SLG 09.
for the time when i bought my ion, it was a decent marker, but today, i would personally go for something different.
BUt if you do end up getting an ion, and have any questions, Drop me a PM and ill help you out as best i can
Oh and Welcome to the forums