a fluffy and swab are the same, the other thing you can use for cleaning your barrel is a straight-shot squeegie, but fluffies are best for cleaning small amounts of paint out and leaving your barrel clean, whereas a straightshot i better for cleaning bad breaks out of your barrel. In an ideal world you use the straightshot then the fluffy, but in reality just grab yourself a fluffy or two. The bottle you've suggested is fine. You may want to upgrade in future, but for a budget it's just fine. You don't really need to service your bottle (they need retesting every 5 years), so don't worry too much about that, but when dealing with these extremely high pressures it is best to go new if there's any doubt.