Additional tray options: http://www.artecindustries.com/Batte...nts_c_134.html
Although its hard to beat those Stainless Trays if the configuration works for your needs. I had them in my 60 and wish he made an 80 series option.
I just got a set (27 & 31) of X2 Power batteries from Batteries Plus: http://www.batteriesplus.com/product...I27AGMDPM.aspx
They make a group 27 which is nice if you want an OEM sized option for an 80. They are pretty much Odyssey clones like the Die Hard Platinum.