There are two Eclipse Computers, one in Coventry, the other in Surrey.
If you are referring to Eclipse Computers of Coventry, then they seem to have a mixed bag of customer service after-sales responses. Some people, including myself (I have only bought low value items) have had no problems, and perhaps regard the company as being okay, while other people have complained bitterly about various things. There are many reviews on the internet about Eclipse Computers of Coventry, which are available via most searches, including this forum.
If they are local to you, then you will have the added advantage of dealing 'face to face' with the company and their representatives, should advice seeking or problems occur.If you are going to buy a complete system, then payment by credit card is suggested for added safeguards and protection. This advice would apply to any purchases, whoever you buy from.