Help with Suspension for 2000 I30

I am a newbee here. I purchased a 2000 Infiniti I30 with 63K a month ago. Car seems to be OK. So far, I have got the brakes serviced and installed ATE slotted rotors & new pads; new engine belt & serviced the transmission. Replaced the air filter with a K&N filter. I have also installed a rear anti-sway bar from Cattman. I am looking to change the struts, shocks & springs. The ride is pretty rough right now, I know the struts & shocks need to be changed, not too sure about the springs. After some research, these are my choices:

1. Tokico Illumina + Eibach springs + mounts from Infiniti.
Projected cost: $950.00. Adjustable ride and car slightly lower.

2. KYB GR-2 + Eibach springs + mounts from Infiniti.
Projected cost: $870.00, almost like original?

3. D2 Racing Coilovers @ $975.00, very attractive at this price.

4. Either #1 or #2 with original springs, cost less $240.00 if the present springs are still in good condition.

Car is used for leisure (I am retired) but once in a while I do like to go for long drives, especially on roads in upstate NY like to West Point and Bear Mountains. I live in NY and roads in my area have lots of potholes and bumps. My regular mechanic - a reliable one - recommended to change the mounts and only use orginal factory parts, other parts he asked me to decide.

I had coilovers on one of my previous car, I like the roadholding, but the ride can be on the harsh side. I have read good and bad about the D2. I read online, & from prior experience, that the Eibach springs are very stiff. I think H&R springs are a better choice but are no longer available. I am also not keen to lower the car, if possible.

My preferred choice is Tokico Illumina with my present springs (but not sure if the springs are still in good condition), adjustable ride & original height, should be almost the same as original and can be stiffen when needed. However, I have no info about anyone using that combo.

Please advise. Thanks.

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Car is used for leisure ...

If you are not going on racing, I bet u wont know the difference if springs/mounts are 60k 'old'/new - except from u wallet.

New decent shocks will make huge impact at 60k - double money will not make big difference sunday driving.

After 200k, things may change.

Thanks for the advice. I have decided on the Tokico Illumina.