You could also settle for a Logitech Z5300 Digital 5.1 Speakers, the only diffrence present between Z5500 and Z5300 is that Z5500 has an External Dolby Digital/dts Decoder, while Z5300 Doesn't; however, both Speakers sport almost same specifications except Z5500 having 500W RMS while Z5300 has 280W RMS, if you don't want to exceed 20k budget, you really can't find any better speakers than Z5300, if you can, than Go get Z5500 they are awesome
if 5.1 isn't your type you could settle for Altec Lansing MX5021 Speakers, their THX Certified and cost Rs.9,200. Hope this helps
