Hey how ya doing.
I have heard quite a few good reviews on how good the Dual Magnet Jaycars do, especially considering there price.
The amp seem to be a good match for the subs, and this was probably the intention of the designers in the first place.
I personally prefer to supply subs with more then there stated rms, simply because the amp my not always be as efficient under different circumstances.
At the last Car Audio Australia club meet, I did a dB test on the Total Recoil car. He had a single 12", 250WRMS hooked up to a 1400WRMS PPI amp. He managed slightly over 147 dB, which is absolutely huge for a single 12, too bad he fried his sub on the second run. Anyhow, he exceeded the power rating of the sub and got some good results, well for a few seconds anyway.
To answer your question, in my opinion, I would say that the setup you have chosen seems to be pretty well matched up, and has a reasonable price tag as well.
CAUTION: Slippery When BOOSTING!