I like Dan's comments regarding having the right attitude and aptitude and flying conservatively.
If money is not an issue then an older 15m ship is probably going to be a better idea if you plan to fly aggressively. I don't compete so flying conservative 3 to 5 hours flights (300 to 500km) on nice days suites me just fine. If I wanted to fly aggressively I would not have bought the Nimbus 2.

I chose the Nimbus 2 for various reasons:
1. There was nothing available with a 40+:1 L/D within my budget. ASW20's were selling for 3 to 4 times the price and club single seaters were not always available and often had a waiting queue which meant long cross country flights on nice days were not possible.
2. I wanted to have 100% ownership in a glider which I know no one else has broken, mis-rigged, etc. without my knowledge. I saw club gliders being abused or landed hard and then hangared for the next person to fly so safety became a motivating factor.
3. The used glider market in my area is very small with limited demand so purchasing something like an Astir G102 and then being unable to sell it later to upgrade to a higher performance glider wasn't an option.
4. I have long legs and the Nimbus 2 is the only glider I've flown which has a long cockpit I fit in comfortably. Getting cramps in my ankle and calf muscles and having an aching lower back after an hour of flying single Astirs was no longer enjoyable. My long legs ruled out older, affordable 15m ships like Astirs, ASW15, ASW19.
5. The area I fly in has large fields (500m to 1500m long) and often with shorter grass crops so outlandings are less of a risk. That allowed me to remove the tail chute to avoid the "will it deploy when I need it" and "accidental deployment" scenarios. I have the single panel Schempp-Hirth airbrakes so approach control is adequate but not great. If you need to outland in fields less than 500m with obstacles on approach then I would not recommend the Nimbus 2. Fiddling with a tail chute which doesn't want to deploy while trying to outland in a small field is not the sort of risk I want to take..

Each individual has different circumstances, needs and abilities. The Nimbus 2 is not what I would regard as a "sweet ship" so take the advice about the ground handling and less ideal properties seriously before making a decision. One of the other pilots in the club bought a Nimbus 2M and his experience has not been great at all. Having the CofG near the aft limits probably played a large part in that experience.
Have you actually flown a Nimbus 2? I suggest you organise a test flight before making the purchase. Maybe you can organise a dual in something with an all flying elevator like a Janus first.