Smartparts for visions
Try this link to the Smartparts website. Go to Catalogue and have a wee nose around.
They have muchos bling Voodoo Vision Impulses, for those with a bag and half of sand to spend, or more basic ones for those wanting to start out in pball.
A word of warning, unless your going for the muchos muchos blingness of a Voodoo, you'd probably end up spending a lot on upgrades. They are good guns outta the box but the list of upgrades is as long as me, well long anyway.
My first marker was a Vision impulse, and it never let me down. You can bling it up / make it faster as you progress. If you can afford it go with air.