I would ignore the 5 star stuff. I've googled "Money Management" and not found anything obviously related (like a magazine).
Whether you choose the investments yourself or let someone else do it, it doesn't necessarily affect the risk. For example, if you've decided that you want your pension invested in a range of footse companies, you could either choose an investment trust that does this and put it in a SIPP or you could choose a managed pension fund that does this. The main difference is that the latter may simply invest in the investment trust that you chose which could mean that you get the same risk but you are charged, say, 1% per year for investing in the pension fund and then the pension fund (in effect you) gets charged another 1% per year for investing in the investment trust.
Whatever you go for, you should be able to easily find out how much the charges are (perhaps just over 1% per year for a managed pension, just under 1% for a SIPP). You should also be able to easily find performance history. If you can't find either of these figures easily, you should simply look elsewhere. It's important though not just to look at the best performing fund (as that is likely to be the most risky) or the cheapest (my view is that it's worth paying a fraction of a percent extra each year just to be dealing with an organisation that you know and trust). Some companies have lower annual charges but higher dealing charges.
All pension funds that you are likely to be thinking about paying into have similar tax benefits. The contributions are tax exempt so, if you pay 22% income tax through a PAYE scheme, you can give the fund a cheque for £780 and they will get another £220 from the inland revenue and invest £1000 less their charges on your behalf.