I nominate Verbatim due to the fact that it outplays most budget-glitched maps out there. Shishka would be mentally ill not to let it into matchmaking. The gameplay and aesthetics are on equal levels, that being extremely high. The balance is amazing for an asymmetrical map and the flow is unrestricted whatsoever by size. This map shows that the budget is truly unneeded for a great forge.
It can be found here.
Link to
Verbatim, for those who also voted.
I am sorry, but I had no idea Aperture was budgeted. I would therefore like to change my vote. Aperture was simply the best map when averaging out all gametypes, from objective to slayer. Others were much more entertaining for specific gametypes, but Aperture certainly had the widest variety of qality. Not to mention the epic aesthetics.
Because I feel Aperture to be the best Halo 3 map, yet it is budgeted, I must put my vote in this category towards Aperture as well.