OK, if you are to be believed:
Buy a DS1054Z and hack it
Buy 2 BM257S (or BM869S) from
www.tme.euBuy a DER EE DE-5000
This will be your best buy for the money.
If you want to spend lots of money for no reason:
Buy some high priced oscilloscope for no reason other than you have too much money and have no idea what you want
Buy 2 Gossen multimeters
You will have no more idea what to do with these things but you will be happy you spent lots of money.
If you don't know what to buy and why you should buy it, then ask the questions and follow the advice of the people here. If you have too much money and don't care about costs and what you know, buy what you want and stop bothering other people with your naive questions and/or contradictory requirements and arguments.