Everyone can say which to buy, but its what feels right for you.
I know some people like the Axe (be it mini or pro) and others love the Etek5, so if you can, visit a walk on and or shop and try a few out.
Nothing wrong with the etha at all, maybe at a push go with a Shaft FR and pro tip?
Or if you havnt done so already, go with a carbon bottle and see how the Etha feels then before upgrading gun.
For me, if you can get an LV1 for £400 that would be my choice at that price, my LV1 would cost more but such a fantastic gun (just not as good as my Dye M2)