Which 2 10" subs for MTX 421D?

I looking for two inexpensive 10 inch 4 ohm subs to run of of the 421D? Where can i buy them?

with 300 to 400 watts I would probable go with either some kappa perfect, or kicker comp, these are fairly inexpensive, can you give a budget for your subs this will help out to give you the best subs for your budget

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Loking at the Hifonics HZ10 for 59.00 or the MTX t4510-04 for same price. The Hifonics Zeus has a 300 watt rating while the MTX is 225? Which one

I've always liked MTX subs.  I wouldn't worry at all about the wattage rating when they're in the same general range. 

I think your choice should depend on the space you have available, what application you plan to use them in (ported, large sealed, small sealed, etc.), and your sound / spl goals.  These considerations are FAR MORE IMPORTANT than worrying about a 75w difference in power rating - a spec that is generally useless when considered outside of an enclosure anyway.

So, what are your sound goals?  What kind of music do you listen to?  What systems have you liked listening to in the past?  Boomy? Tight?  Clean?  Loud?  How large a volume enclosure are you shooting for?  These are far more important questions, in my opinion.

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New Project: 2003 Pathfinder

I listen to mostly techno and dance60%, rap 40%. Im looking for clean and tight? I dont have to much experience with systems? And the Hifonics HZ10 is 400 watts not 300