I've not heard of placing speakers across the length of the room recommended before, quite the opposite, but anything is worth trying until you find a sound you like!

GIK acoustics have some solid advice on their information pages which are really good for helping with optimal setup. Personally I'd place the speakers facing down the length of the room and seating position about 1/3 way into it, AND treat early reflection points.

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502