Lucky you!!! Eddie's suggestions are right on - Madrid and environs and the south for February. Mid-March, try and be in Valencia then spend the remainder of your time in Barcelona, San Sebastian, etc. Noticed you were from New York so I know you're used to the cold but why invite it? Spending February and even the first couple of weeks in March anywhere but in the northern part of the country will be warmer - then, by the time you head north, the worst of it will be over. You're not likely to find a lot of tourists anywhere that time of year and thats a huge plus.
I don't know if any of the bus lines or trains have a 'get on/ get off' type of ticket where you more or less buy a pass and, if you see a place that appeals to you, you can get off at that stop and stay a bit.
Am thinking something other than a EuroRail pass as most of those routes (to the best of my knowledge) don't stop in the smaller and often charming towns. Any board members have knowledge of this kind of ticket?
What are you guys most interested in seeing - history/culture/family - what draws you to Spain - with a bit more guidelines, I'm sure everyone can give you a ton of input on what to not miss - and why. Let us know ...
[This message has been edited by Puna (edited 12-20-2000).]