An unlimited budget? Give me a reasonable amount of time as well--this means far less college work--and I'll attempt one or more of the following:
- ZGMF-X20A Strike Freedom Gundam from Gundam SEED Destiny (as made by "Goldy" on Cosplay.com)
- PTX-015 Wildwurger or PTX-016 Wildfalken from the Super Robot Wars series.
- Nick Vrenna's powered armor from Abuse.
- ARX-8 Laevatein from the Full Metal Panic! series.
- "Paparazzi Gundam" (don't ask; it's an inside joke)
Pretty much any involved mecha cosplay would do well, in fact.