Defiantly add more options. Your adding to many eggs in one basket, you need to spread your risk.
If PayPal tomorrow decides to limit your account that is 100% of your clients now unable to pay you (Or you withdraw your funds for 6 months), if you are unable to resolve the issues (caused by several chargebacks etc...) then your out of business, your employees etc...
Having multiple options spreads your risk so if you loose one, you still have money coming in without issues.
Of course it is a huge benefit to clients also, as *many* are unable to use PayPal (or just prefer not to use it).
Where are you located? I'll see what good options are available to you. Generally speaking, Stripe & Skrill would be good additions.