Hi Gary,
Every place has advantages and disadvantages so you will have to take them all into consideration and weight them all up. You will get a good feel for the place and which area suits you best when you come out to view properties.
If you buy somewhere in the very busy area, you will be within walking distance of many restaurants and bars but you may find it to be too crowded and noisy in the Summer so you might have some sleepless nights due to the noise. If you buy near the Marina de la Torre it will be quieter but this may be preferable during the Summer. It is a further from the night life in Mojacar but it closer to Garrucha which is a very nice town with lots of restaurants, a lovely promenade and a good beach.
I have had dealings with a few agents in the area and I have found Claus van Mierlo from Nicla-Casas and Steven Howlett from VIP Almeria to be the most helpful and responsive to emails and queries. As far as solicitors are concerned, I have found Michael Davies from Davies Abagados to be very good. Some people also recommend Angela Morales. Both of these solicitors are in Mojacar.
I have tried out several currency transfer companies and I have found the Transferwise.com give the best rates so I only use them now.
I hope that this helps.
Mike