If you intend to purchase a new PC, have one custom built to suit your exact requirements. It is not expensive. There are many advantages. Construction conforms to industry standard and you are not locked in to Dell, HP or PC World. Anyone can service and maintain the equipment.
It goes without saying that all parts used are from respected manufacturers such as Gigabyte, Sony, Seagate, CoolerMaster, Intel and Microsoft.
Your existing data can be copied to the new PC and configured exactly as required.
Unlike most suppliers, the original master operating system discs are included with your new computer and your choice of programs and other software pre-installed.
If you would like to watch your new PC being built or get involved and help with its construction (a great way to learn) that is not a problem.
A very personal service.