If you're going to put your own deal together, rather than buy a package, it'll be best to book now while February flights to Rome are still cheap.
I've just tried a theoretical booking for 2 people using Ryanair's flights and hotels. Flying out from Stansted early on Thursday 16 Feb and returning from Rome early on Sun 19 Feb, I got a lowest price of about �103 per person. This includes return flights, all taxes and charges, pre-booked coach transfers to central Rome and 3 nights accommodation in a twin-bedded room. I very much doubt that waiting until later would reduce those prices. Indeed, the opposite is far more likely.
If you live reasonably close to an airport served by Ryanair, I suggest taking a look at their website to see if there are flights and hotels to suit your needs:
http://www.ryanair.com/site/EN/
(Some flights to Rome are currently being offered as 'Free', i.e. taxes and charges only)
To pre-book the coach from Ciampino Airport to the city centre (40 minute journey), see here:
http://www.terravision.it/rome_ciampino.html
Hoping this helps,
Chris