Dont buy the wiimake... just... dont... because the original DtP is on the Playstation store for $6 and is just the better version....
EDIT: Sorry. I misread the OP. I'd say that the original DtP is still worth it because of it's relatively low price and the fact that it's the better version.
If you wanna buy a GBA game, there is always the possibility emulating it, GBA emulators are free and literally everywhere for every platform... However if you want to own one for the sake of making a collection, or you want to give your money to the Wii U version (I chose all three, I have three different versions of the GBA games
) I still think Empire of Dreams is better than Dream Champ, because the story and music is better... (Dream Champ does have better graphics, though)
On amazon I believe the GBA games go for around $6 and they're (?????) $5 on the Wii U? Somebody come correct me on that. Klonoa Heroes can't be found on amazon and is $13 on ebay (for just the pak and no box).
There's also Klonoa Beach Volley
(Emulate that, really,) (Unless you have a European or Japanese PS1/PS2/PS3)
Lunatea's Veil comes to be the most expensive of all the games (unless you care to play the wonderswan game, in which case, be prepared to shell out $40 at the least) at around $20 (not including shipping) for a used copy on amazon. This is how I got my copy.
Honestly I think that DtP is the best value if you buy it from the PSS, but it's your choice in the end... I have very strong, unpopular opinions concerning Klonoa 1 and 2, so I'm not really here to talk which game is objectively better, I'm focusing more on pricing... I hope this helps in any way...!