I love my reverbs and delays for me personally theres Strymon blue sky is the wicked but costs aroud £250.00. As per the above this thing comes into its own when in stero though so if youre playing in mono id go for the Line 6 Verbzilla if you want someting awesome and half the price, seen it on GAK for £100. I know Line6 can have a bad rep (And rightly so I hate their amps and distortions) but all of there there modulation fx are spot on.
+1 I agree with you there as I used to own the Verbzilla and it's a very good pedal, especially for the money, the modulated verb mode is amazing.
They're definitely pro standard ive lost count of the metal guitarists than use them in their rigs. I have the line 6 multi stomp box effort which includes mods, delays and reverb and boosts and distortions. It very very good, maybe i dont know how to get the best out of the distortions who knows!