test @ 400 + EQ @ 400 is a fairly moderate dosage IMO. Not light, but not ridiculous. A good amount for some serious gains on a first cycle though!

If you start getting big, just do what "The Joe Weider" (is he still around?): pass it off as using lots of protien shakes, supplements and creatine!

As for how much to expect:

Q: How much can I expect to gain on a bulking cycle of ______?

A: Nobody can tell you that. Everybody responds differently; two people can take the same drugs for the same amount of time and have drastically different results.

Your success depends on a lot of personal factors: your training, your diet, what steroids you take, how many cycles you have done and how your body responds to steroids.

If you need some ballpark numbers: gains of 10 pounds are generally easy to achieve; gains of over 30 pounds of lean body mass (muscle) are rare, so expect something in between.