Pre Amp or Amp Best Money Spent

Long term benefits are best served by buying the best pre-amp you can afford, Rogue or not, and then build up your system around it. Speakers, amps, and sources come and go with regularity but most folks could effectively use the same pre-amp for a decade or more without change and with complete satisfaction if you select it properly in the first place. FWIW.

In general, the preamp will have more effect on sound than the the amp (as long as the speakers have enough power). The Rogue 90 will drive the 2CEs without a problem. You might consider have them upgraded to Signature if Vandersteen still offers the upgrade. It is much more transparent than the standard speaker.

I would personally go for the better preamp and the budget amp. I always found the better pre gave me more of what I wanted as far as sound quality.

Well, I'm going to go against the grain of the above suggestions and recommend you do some deep digging to find out what amp best mates with the Vandy 2CE speakers and put your money there. Amp/speaker match is critical for best sound. You can buy the world's best preamp, and the system will still sound like sh*t if your amp/speaker match isn't good.

Do you know the Rogue amps are the best options?

I back Tvad. A match between Power Amplifiers and Speakers is more important than Pre-amplifier. Everything depends on the type of load your speakers present to the Power Amplifier.

See the following article. This will give you the details:
http://www.symphonysound.com/articles/tubefriendly.html