I record quite a lot and I use monitors and headphones. I have passive Quad 22L speakers and 909 amp plus an REL Sub that I sometimes use for monitoring to check low end. I also use an AKG k601 headphone that I drive from a dedicated headphone amp. I believe using the headphone as well is critical because so many people today listen with headphones via Ipods, Smart phones, etc. I also find that I can identify balance and panning issues easier with headphones ( of course you need good ones ). I find the AKGs to be very neutral and open.

So as an alternative you can also consider passive quality speakers such as Quad, Spendor, KEF, etc. and supply your own amplification. That may be more expensive but gives you more flexibility and I believe better quality.