You want an engine from the future? The Accord just started the 11th generation. I believe a close to direct swap is the Odyssey LX/EX motor if you want the 3.5.
So I am going to make a thread that tells you exactly what motor and transmission combination that will work for the accord 03-07 v6 if you want to swap it. I am tired of people sending me PM. Now start reading or have something read it to you, and learn. Engine Accord 03-05 stock motor J30A4...
www.v6performance.net
"2005+ Honda Odyssey Van, LX, EX, 2005 Honda Pilot J35A6 (direct drop in with some modification to the coolant crossover pipe/passage {must switch over from the accord}, must repin the injectors or use stock 270cc, and also must swap IM if AT)
Displacement: 3,471 cc (3.471 L; 211.8 cu in)
Bore and stroke: 89 mm (3.5 in) x 93 mm (3.7 in)
Power: 255 hp (190 kW) @ 5600 rpm
Torque: 250 lb·ft (340 N·m) @ 4500 rpm
Compression: 10.0:1"