Hi m8, hope that intelli worked out ok for you?
Like Clare said, there's a range of upgrades you could get - it depends what you're hoping to achieve.
To improve the looks of your marker and lose some weight, you could go for a ULE body - they're aluminium rather than stainless and come in range of colours, plus you'd then be able to choose from the wider range of cocker barrels (tho that'd make your mag freak set redundant).
Performance wise the best thing you could do is change your classic valve for a 'RT' style - either a Retro or X valve. The X is lighter and comes with L10, but as you've already got L10 you'd probably be better off finding a retro secondhand.
You could then look at the ULE trigger kit (they work better with retro valves than classics) to lighten your trigger pull.