Not to mention INCREDIBLY epic. Though not quite as epic as Gravion. Oh and i've seen more fanservicey try Aquarion EVERY combination has them orgasming.
Oh and the music is doen by Yohko Kanno so that just adds to the epic.
---------- Post added 2011-05-26 at 07:54 PM ----------
Oh and for some oldschool fun check out Paralell Trouble Adventure Dual. Its sone by the guy who did the Tenchi series as well as Isekai Seikishi no Monogatari(as well as a few VERY well done hentai)
Oh and the mech is probably the same one as seen in gxp but THIS was where it originated.