need advice on subs, should I switch to these

[brianemc2]

<new to DIYaudio>

Hi,

I need advice on my bass setup. I have a 97 4Runner with full aftermarket system.

Alpine Head Unit
Alpine V-12 4 Channel 100x4 RMS
Infinity Kappa Front 6.5" & Rear 6x9

MTX 6500D [rated at 600W RMS (2ohm) @ 12v; bench tested 725W RMS (2 ohm) @ 14.4v]
2 MTX 12" subs (rated at 250W RMS each)
1 Sealed QLogic dual 12" box

Here is my issue:

The bass doesn't really sound that loud to me and when it is loud it doesn't sound very clean. I don't think the issue is my amp, I had it tested about 18 months ago and it was certified by MTX.

I am considering swapping out the 2 y/o MTX 12" subs for Alpine Type R DVC subs. These subs can handle 350W RMS and are supposed to sound really great.

Does anyone think there will a noticeable difference in loudness and quality? - This would be a $300 upgrade.

Thanks

Brian