Good advice given... It all depends on budget, time, and what looks cool to you.
If you have a few $$, f-glass is a great way to go
I used the MC 2.6" fibre Arcas flying on an AT H100W. Straight forward assembly, flights are straight as an arrow, and it's relatively inexpensive as far as f-glass goes (as such won't break the bank if lost). Mine was hanging from a tree in TN until it was taken by someone... eh, it happens.
If $$ in short supply (such is the case most of the time), a cardboard tube bird can be used as well.
Example: My wife has flown her cardboard tube Estes Partizon on H's before, though there are a few mods that I'd perform; using all epoxy for the assembly, adding rail buttons, Kevlar shock cord, and a jolly logic. She'll get her L1 early next year with it (tape the nosecone for a snug fit...).
In any case, make sure you ask any questions you may have or find as you're building. TRF and your local club are great resources.
Don't forget to have a little fun too!
fm
PS. For those who would like to dual cert, the intention with the MC Arcas was to fly it on an H, I, J, baby K (if I could find one); thereby also getting my L2. It was painted frost white with pseudo starbucks green vinyl arranged to look like a SB coffee cup (FM logo instead), and instead of the content in squares, each square had a letter from H-J over it. May get another for xmas...