The next thing you need to do when looking for Unlimited cards is: Subscribe to our New Arrivals Drop Every Wednesday, each week of the year, we get new High-End cards
Sure, you have to build your deck somewhat around being able to usefully play Upheaval but given that it is such a good counter to so many of the things going on in the cube, one of the very best safety buttons in the game, that it remains one of the most feared cards in cube
Munkidori 095/167 TWM 110 HP (Psychic) Ability: Adrena-Brain: Once during your turn, if this Pokmon has any [D] Energy attached, you may move up to 3 damage counters from 1 of your Pokmon to 1 of your opponent's Pokmon
For long-term value: High Class Packs (released annually in December) have historically appreciated after going out of print
I believe that G/B/W is the best color combination at the moment, and that's because it offers the best silver bullet creatures